Download the installer and double click on it to start the installation. If Windows prompts you to allow the installer to run, click yes.
Note: Windows may prompt you with a dialog titled "Windows protected your PC". If you see this, click on the "More Info" link in the dialog, and click the "Run anyway" button that appears at the bottom.
The app checks for new updates automatically whenever it is launched and prompts you to install it. You can manually check for updates by clicking the "Check for updates" link in the app's Windows start menu folder. You can also check for updates within the app by going to Menu > About > and clicking the "Check for Updates" button.
To uninstall the app, open the "Add or Remove programs" window, search for "Alarm Clock HQ" and click the uninstall button.